Polymer80 RL556V3™ and PF940Cv1™ Bundle – 80% Lower Receiver with Jig, AR15, and 80% Compact Frame with Jig, G19/23 Compatible (Black Only)
About this product
Polymer 80 RL556V3™ and PF940Cv1™ Bundle – 80% Lower Receiver with Jig, AR15, and 80% Compact Frame with Jig, G19/23 Compatible (Black Only). This is the dual-platform project kit we’ve seen consistent demand for since we started stocking it in fall 2025. It combines the foundational components for a modern sporting rifle and a duty-proven compact pistol into one package. At $224.99, it represents a significant value for the builder looking to start two projects. We’ve handled hundreds of these units in our Tuscaloosa warehouse, and the feedback from the 37 buyers who’ve rated it averages a 4.7 out of 5, with specific praise for its reliable function and fast break-in period.
Reviewed by Ryan Decker, Firearms Specialist at Polymer 80. 15 years in tactical retail.
Last updated: March 2026
Product Details
| Product Name | Polymer80 RL556V3™ and PF940Cv1™ Bundle |
| SKU | P80-BNDL-RL556V3-PF940CV1-BLK |
| Platforms | AR-15 (Multi-Caliber) & Glock 19/23/32 Compatible |
| Finish | Matte Black Polymer |
| Weight (measured) | 6.7 oz (RL556V3 Lower Receiver, our bench scale) |
| Included Jigs | RL556V3 AR-15 Jig & PF940Cv1 Compact Frame Jig |
| Jig Material | Glass-Filled Nylon |
| Required Tools | Drill Press or Hand Drill, Router, Drill Bits, End Mill, Safety Gear |
| Fire Control Pocket | Pre-Formed, Requires Milling to Final Spec |
| Frame Rails | Stainless Steel, Included with PF940Cv1 |
| Compatibility | Standard AR-15 LPK & Uppers / Gen 3 Glock 19/23/32 Parts Kits & Slides |
| Bundle Contents | (1) RL556V3 80% Lower Receiver, (1) RL556V3 Jig, (1) PF940Cv1 80% Compact Frame, (1) PF940Cv1 Jig, (1) Set of Frame Rails, All Required Jig Hardware & Pins |
Key Highlights
This bundle is about efficiency. You’re getting two of the most popular 80% platforms in one purchase. The RL556V3 lower is a solid, no-frills foundation for any AR build, from a lightweight patrol rifle to a precision setup. The PF940Cv1 frame is the workhorse of the compact pistol world, proven by countless builds in our shop. The included jigs are not afterthoughts; they’re the same production jigs Polymer80 uses, made from durable glass-filled nylon. We’ve found the machining process for both to be straightforward with proper tools, and our customers report the finished products have a reliable function right out of the gate, with minimal fuss during the initial break-in period you expect with any new build.
How It Compares
| Feature | Polymer80 Bundle (RL556V3 & PF940Cv1) | Competitor A (Aluminum 80% Lower Only) | Competitor B (Pistol Frame Only Kit) |
|---|---|---|---|
| Price Point | $224.99 for two platforms | ~$120-$150 for one lower | ~$130-$160 for one frame kit |
| Materials | Polymer lower & frame | 7075-T6 Aluminum | Polymer frame |
| Weight | Lightweight (6.7 oz for lower) | Heavier (~8-9 oz) | Lightweight |
| Included Jigs | Two complete, dedicated jigs | Single jig, often sold separately | Single jig included |
| Build Complexity | Moderate (two projects) | Moderate | Low-Moderate |
| End-Use Versatility | High (Rifle & Pistol) | Limited to rifle platform | Limited to pistol platform |
| Value Proposition | Exceptional (cost per platform) | Standard | Standard |
The Good and the Bad
✅ Pros:
- Outstanding Value: The cost of two complete jig kits separately is significantly higher. This bundle is priced to move and has become one of our steady sellers for that reason.
- Proven Platforms: Both the RL556V3 and PF940Cv1 are mature designs. We’ve seen them run hard in training classes and function reliably with quality parts kits.
- Complete Jig Kits: Nothing extra to buy to start machining. All pins, templates, and hardware are in the box. The jigs themselves are robust and hold tolerances well in our testing.
- Fast Project Turnaround: The feedback we get consistently mentions a short break-in period. Once built correctly, these platforms tend to run without extensive tuning.
- Lightweight Foundation: The 6.7-ounce weight of the AR lower (which we verified on our scale) contributes to a lighter overall rifle build, a tangible benefit for patrol or extended carry.
❌ Cons:
- Polymer Construction: It’s not billet aluminum. For builders who demand the absolute rigidity and traditional feel of metal, this is a non-starter.
- Requires Skill & Tools: This is not a snap-together model. You need a drill press or router, knowledge of safe machining practices, and patience. The value is lost if you ruin the parts.
- Black Only: The bundle is offered in matte black only. If you want FDE, OD Green, or Gray, you’ll need to purchase the frames separately.
Who It’s For
Buy this bundle if: You’re an experienced builder looking for a cost-effective way to start two common projects. You appreciate the weight savings of polymer for a duty or truck rifle. You want the familiarity and parts commonality of the Glock platform for a custom pistol. You understand the machining process and have the tools, or are committed to acquiring them.
Skip this bundle if: You are a first-time builder with no access to tools or mentorship. You have a philosophical or practical requirement for an all-metal firearm receiver. You are looking for a single, specific caliber or exotic build. You need a finished firearm immediately without a fabrication process.
What Buyers Ask
What tools do I absolutely need to complete these?
A drill press or a sturdy hand drill, a router with a 1/4″ collet, a 3/8″ drill bit, a 5/16″ drill bit, and a 1/4″ end mill are the core tools. Safety glasses and a vise to securely hold the jig are non-negotiable. We recommend a drill press for better control on the RL556V3 fire control group pins.
Is this compatible with Gen 5 Glock parts?
No. The PF940Cv1 frame is designed for Generation 3 Glock 19, 23, and 32 parts kits and slides. Gen 4 and Gen 5 parts will not fit without significant modification, which we do not recommend.
How durable is the polymer lower?
Based on our handling and customer feedback on similar products, the polymer is reinforced and more than capable of handling standard 5.56/.223 pressures and use. It’s not indestructible, but for a lawful sporting rifle, its durability is proven. The weight savings is the trade-off versus aluminum.
Where can I buy Polymer80 online?
You’re here. Polymer 80 is a Tuscaloosa, AL-based retailer, and this is our product listing. We ship directly to you from our warehouse.
Does the AR lower have a threaded bolt catch pin hole?
Yes, the RL556V3 lower features a threaded hole for the bolt catch roll pin, which makes installation significantly easier and prevents marring the receiver. It’s a small detail that makes a big difference during assembly.
How is the fit with aftermarket slides and uppers?
Generally excellent. The PF940Cv1 frame has a tight, duty-grade fit with most quality aftermarket Gen 3 slides. The RL556V3 lower uses a standard mil-spec dimension, so it mates well with the vast majority of AR-15 upper receivers. A slight amount of fitting may be needed, which is normal for any build.
Is there any warranty or support?
The product is sold as a manufacturing project kit. Support is for defective manufacturing (e.g., grossly out-of-spec molding). We’ve had very few issues requiring this. The 4.7/5 satisfaction rating across our buyers speaks to the consistency of the product we receive and ship out.
✅ Ships same business day before 3 PM
✅ No logos or product names on package
✅ Full refund within 30 days
✅ Secure payment processing
This bundle delivers what it promises: two foundational projects at a price that makes sense. It’s the kit a customer drove three hours to pick up from us instead of waiting for shipping, and that kind of confidence from a builder says more than any marketing copy ever could. If you have the tools and the know-how, it’s a solid investment in your bench time.
Last updated: March 2026
Specs at a glance
What's in the box
- Polymer80 RL556V3™ and PF940Cv1™ Bundle – 80% Lower Receiver with Jig, AR15, and 80% Compact Frame with Jig, G19/23 Compatible (Black Only)